1. Barrar, R. B. and R. M. Redheffer, "On nonuniform dielectric media," IRE Trans. Antennas Propag., 101-107, 1955.
doi:10.1109/TAP.1955.1144299
2. Richmond, J. H., "Transmission through inhomogeneous plane layers," IRE Trans. Antennas Propag., No. 5, 300-305, 1962.
doi:10.1109/TAP.1962.1137877
3. Richmond, J. H., "Propagation of surface waves on an inhomogeneous plane layer," IRE Trans. Antennas Propag., No. 11, 554-558, 1962.
4. Sossi, L., "A method for the synthesis of multilayer dielectric interference coatings," Izv, Vol. 23, No. 3, 223-237, 1974.
5. Urbani, F., L. Vegni, and A. Toscano, "Inhomogeneous layered planar structures: an analysis of the reflection coefficients," IEEE Trans. Magn., No. 9, 2771-2774, 1998.
doi:10.1109/20.717644
6. Bilotti, F., A. Toscano, and L. Vegni, "Very fast design formulas for microwave nonhomogeneous media filters," Microw. Opt. Tech. Letters, 218-221, 1999.
doi:10.1002/(SICI)1098-2760(19990805)22:3<218::AID-MOP20>3.0.CO;2-Q
7. Vegni, L. and A. Toscano, "Full-wave analysis of planar stratified with inhomogeneous layers," IEEE Trans. Antennas Propag., No. 4, 631-633, 2000.
doi:10.1109/8.843679
8. Toscano, A., L. Vegni, and F. Bilotti, "A new efficient method of analysis for inhomogeneous media shields and filters," IEEE Trans. Electromagn. Compat., No. 8, 394-399, 2001.
doi:10.1109/15.942611
9. Khala j Amirhosseini, M., "Three types of walls for shielding enclosures," J. Electromagn. Waves Appl., No. 6, 827-838, 2005.
doi:10.1163/1569393054069109